Electromagnetic actuator and operating arrangement for operation of a valve arrangement

Abstract

An electromagnetic actuator is disclosed. The actuator has a coil arrangement which can be excited electrically, and has an armature. The armature is mounted such that it can move axially in the coil arrangement, is composed of soft magnetic material, and is moved in the axial direction when the coil arrangement is excited. A guide sleeve is fixed in the coil arrangement and guides the armature in the axial direction. The guide sleeve is produced from a soft magnetic material.

1. An electromagnetic actuator configured to operate a valve arrangement, the actuator comprising
 a valve control element configured to be moved by a linear actuator in the axial direction between a first actuating position and a second actuating position; and 
 a valve control lever coupled to the valve control element and to the valve arrangement, wherein the valve control lever is configured to move between a first valve position and a second valve position, wherein the valve control lever is coupled to the valve control element via a slide which is mounted such that the slide can be moved in the axial direction on the valve control element, wherein the slide is prestressed in the first actuating position such that the valve control lever is forced to the first valve position, and wherein the slide is configured to be moved to the second actuating position such that the valve control lever is forced to the second valve position. 
 
   
   
     2. The electromagnetic actuator according to  claim 1 , wherein the valve control element is prestressed to the first actuating position by a first spring. 
   
   
     3. The electromagnetic actuator according to  claim 2 , wherein the first spring is configured to act directly on the valve control element. 
   
   
     4. The electromagnetic actuator according to  claim 2 , wherein the first spring is supported on a flange section of a guide sleeve fixed to a housing of the linear actuator. 
   
   
     5. The electromagnetic actuator according to  claim 1 , wherein the slide is prestressed to a slide basic position with respect to the valve control element by a second spring in the first actuating position of the valve control element. 
   
   
     6. The electromagnetic actuator according to  claim 5 , wherein the valve control element is prestressed to the first actuating position by means of the first spring means, wherein the first spring is configured to act on the slide from one side in the axial direction, and wherein the second spring is configured to act on the slide from the opposite side in the axial direction. 
   
   
     7. The electromagnetic actuator according to  claim 5 , wherein the valve control element is prestressed to the first actuating position by the first spring, wherein the second spring is stronger than the first spring, and the slide is forced to the slide basic position against a stop on the valve control element. 
   
   
     8. The electromagnetic actuator according to  claim 5 , wherein the second spring is supported on a projection at a free end of the valve control element. 
   
   
     9. The electromagnetic actuator according to  claim 8 , wherein the projection is formed by a disc which is fixed on a circumferential groove in the valve control element. 
   
   
     10. The electromagnetic actuator according to  claim 9 , wherein the disc has a recess configured to hold a locking washer on the side facing away from the second spring, wherein the locking washer may be inserted essentially without any force from the side into the circumferential groove in the valve control element. 
   
   
     11. Operating arrangement according to  claim 1 , wherein at least one of the slide and the disc is provided with spring guide attachments configured to guide the second spring. 
   
   
     12. The electromagnetic actuator according to  claim 1 , wherein the slide has a holder comprising a longitudinal section having an approximately hourglass shape, and configured to couple to the valve control lever. 
   
   
     13. The electromagnetic actuator according to  claim 1 , wherein the valve control element is connected to an armature of the electromagnetic actuator. 
   
   
     14. The electromagnetic actuator according to  claim 1 , comprising:
 a coil arrangement configured to be excited electrically; 
 an armature mounted such that it can move axially in the coil arrangement, wherein the armature is formed from a soft magnetic material and configured to move in the axial direction when the coil arrangement is excited; and 
 a guide sleeve, fixed in the coil arrangement and configured to guide the armature in the axial direction, wherein the armature is connected to the valve control element. 
 
   
   
     15. The electromagnetic actuator according to  claim 14 , wherein the guide sleeve is formed from a soft magnetic material and wherein the armature is coated at least in the area of its outer surface by which it is guided in the guide sleeve, with a coating which reduces friction.